Malicious PDF — malware analysis report

Static analysis result for SHA-256 1daf5239544ad357…

MALICIOUS

PDF

78.6 KB Created: 2021-05-24 06:41:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: 0612469e20451d023a282b66a94050d1 SHA-1: 9375ec613f4408b6449bd109ea62f5b78cbdd1dd SHA-256: 1daf5239544ad357c7ae8e5c36e6c5c5163f1f512067868f4857f0a77324715b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file was flagged by multiple heuristics as malicious, including ClamAV and an ML classifier. It contains a link farm with numerous external PDF links, suggesting a phishing or SEO poisoning attempt. The embedded URL `https://soxebez.ru/wb?keyword=husqvarna%20leaf%20blower%20spark%20plug%20replacement` indicates a lure related to common search queries, likely to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://soxebez.ru/wb?keyword=husqvarna%20leaf%20blower%20spark%20plug%20replacement PDF link annotation
    • https://xemilesexevig.weebly.com/uploads/1/3/4/2/134266110/b316e5e74d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393370/normal_60060fee261b4.pdfIn PDF document text
    • https://demujerifusa.weebly.com/uploads/1/3/1/4/131437649/fomamavafif_rutexarerag.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4444378/normal_5fcaf9d349798.pdfIn PDF document text
    • https://bebaguromiva.weebly.com/uploads/1/3/0/8/130813696/29cf28d54ec.pdfIn PDF document text
    • https://xafinuwexedigu.weebly.com/uploads/1/3/1/3/131379324/6311dba31cae.pdfIn PDF document text
    • https://riwurarelix.weebly.com/uploads/1/3/4/4/134484082/safobemoxiwet-biviwejoninovuw-giximi-tubok.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385004/normal_5fd16a9d96114.pdfIn PDF document text
    • https://gitexapovaje.weebly.com/uploads/1/3/4/4/134464395/genotazabuz.pdfIn PDF document text
    • https://repawuwo.weebly.com/uploads/1/3/5/3/135313919/giwodiwami.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369775/normal_603bc5c82cf32.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481280/normal_60119df8cfb57.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/palevijuj/2496997262.pdfIn PDF document text
    • https://s3.amazonaws.com/savukojubusum/70016495090.pdfIn PDF document text
    • https://s3.amazonaws.com/rimejiguvif/gujedizuwovatumob.pdfIn PDF document text
    • https://s3.amazonaws.com/guwutivupudutu/sogepogilupawe.pdfIn PDF document text
    • https://s3.amazonaws.com/gudukupir/anemia_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/bejeseja/reindeer_antlers_headband_craft_template.pdfIn PDF document text
    • https://s3.amazonaws.com/fezenur/42681747142.pdfIn PDF document text
    • https://s3.amazonaws.com/tuxexi/classification_of_anaemia_according_to_who.pdfIn PDF document text
    • https://s3.amazonaws.com/tezude/justice_league_dark_animated_full_movie.pdfIn PDF document text
    • https://s3.amazonaws.com/robumuduluwise/the_end_of_evangelion_music.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f351.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF351 5780 bytes
SHA-256: e8403c45304156018173af7ddb9ac7df7c5e64108d3840cabd567ccd86c0f760
font_01_sfnt_off00010708.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10708 11136 bytes
SHA-256: 62dc663b88dd8746bea338711950b45a2134d9c6c560e4a4fd7a1e130e44ade0

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